Anyone have a GM radio coding hookup?

[glee60]

Does anyone work at or know anyone who works at a GM dealer that could help me/us out with coding a radio for our company's GMC Savana cube van? I'm trying to make a case that we need to ditch our AM/FM only radio in our work truck as it's a cross country hauler. I'm sick of FM modulators and attempting to find a non cost prohibitive option that won't get stolen where we park it.

It's a 2003 GMC Savana with a whopping 2 speakers! I would be doing any install labor, just did all the research and realize whatever I get (that is compatible of course) needs to be coded to our VIN.

I would be happy to pay too, I've just seen 2 hours of labor thrown out as an average which seems insane for coding.

Thanks all!